Abstract : This is a report of an occupational survey of the Refrigeration and Cryogenics career ladder (AFSCs 54530, 54550, and 54570) completed by the Occupational Analysis Branch, USAF Occupational Measurement Center, in May 1983. The survey was requested by the Classification Branch of the Air Force Manpower and personnel Center (HQ AFMPC/MPCRPQ2) to evaluate the effect of the April 1980 merger of the Refrigeration and Air Conditioning career ladder (AFS 545XO). Previous occupational survey reports (OSRs) on these career ladders were published in September 1977 and June 1978, respectively. (Author)